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How to use disposeObject method in Playwright Internal

Best JavaScript code snippet using playwright-internal

simplepool.js

...108goog.structs.SimplePool.prototype.releaseObject = function(obj) {109  if (this.freeQueue_.length < this.maxCount_) {110    this.freeQueue_.push(obj);111  } else {112    this.disposeObject(obj);113  }114};115/**116 * Populates the pool with initialCount objects.117 * @param {number} initialCount The number of objects to add to the pool.118 * @private119 */120goog.structs.SimplePool.prototype.createInitial_ = function(initialCount) {121  if (initialCount > this.maxCount_) {122    throw new Error(123        '[goog.structs.SimplePool] Initial cannot be greater than max');124  }125  for (var i = 0; i < initialCount; i++) {126    this.freeQueue_.push(this.createObject());127  }128};129/**130 * Should be overridden by sub-classes to return an instance of the object type131 * that is expected in the pool.132 * @return {T} The created object.133 */134goog.structs.SimplePool.prototype.createObject = function() {135  if (this.createObjectFn_) {136    return this.createObjectFn_();137  } else {138    return {};139  }140};141/**142 * Should be overrideen to dispose of an object. Default implementation is to143 * remove all of the object's members, which should render it useless. Calls the144 *  object's dispose method, if available.145 * @param {T} obj The object to dispose.146 */147goog.structs.SimplePool.prototype.disposeObject = function(obj) {148  if (this.disposeObjectFn_) {149    this.disposeObjectFn_(obj);150  } else if (goog.isObject(obj)) {151    if (goog.isFunction(obj.dispose)) {152      obj.dispose();153    } else {154      for (var i in obj) {155        delete obj[i];156      }157    }158  }159};160/**161 * Disposes of the pool and all objects currently held in the pool.162 * @override163 * @protected164 */165goog.structs.SimplePool.prototype.disposeInternal = function() {166  goog.structs.SimplePool.superClass_.disposeInternal.call(this);167  // Call disposeObject on each object held by the pool.168  var freeQueue = this.freeQueue_;169  while (freeQueue.length) {170    this.disposeObject(freeQueue.pop());171  }172  delete this.freeQueue_;...

Using AI Code Generation

1const { chromium } = require('playwright');2(async () => {3  const browser = await chromium.launch();4  const context = await browser.newContext();5  const page = await context.newPage();6  await page.screenshot({ path: 'example.png' });7  await browser.close();8})();9const { chromium } = require('playwright');10(async () => {11  const browser = await chromium.launch();12  const context = await browser.newContext();13  const page = await context.newPage();14  await page.screenshot({ path: 'example.png' });15  await context.disposeObject(page);16  await context.disposeObject(context);17  await browser.disposeObject(browser);18})();19const { chromium } = require('playwright');20(async () => {21  const browser = await chromium.launch();22  const context = await browser.newContext();23  const page = await context.newPage();24  await page.screenshot({ path: 'example.png' });25  await context.disposeObject(page);26  await context.disposeObject(context);27  await browser.disposeObject(browser);28})();

Using AI Code Generation

1const { chromium } = require('playwright');2(async () => {3  const browser = await chromium.launch({ headless: false });4  const context = await browser.newContext();5  const page = await context.newPage();6  await page.screenshot({ path: 'example.png' });7  await page.close();8  await context.close();9  await browser.close();10})();11const { chromium } = require('playwright');12(async () => {13  const browser = await chromium.launch({ headless: false });14  const context = await browser.newContext();15  const page = await context.newPage();16  await page.screenshot({ path: 'example.png' });17  await page.close();18  await context.close();19  await browser.close();20  await browser._browserContext._browser._connection._transport._ws.close();21})();

Using AI Code Generation

1const { chromium } = require('playwright');2(async () => {3  const browser = await chromium.launch();4  const page = await browser.newPage();5  await page.screenshot({ path: 'example.png' });6  await page.close();7  await browser.close();8})();9const { chromium } = require(‘playwright’);10(async () => {11const browser = await chromium.launch();12const page = await browser.newPage();13await page.screenshot({ path: ‘example.png’ });14await page.close();15await browser.close();16})();17at new Promise (<anonymous>)18at CDPSession.send (/Users/mohammedshahid/Downloads/PlaywrightTest/node_modules/playwright/lib/server/cjs/protocol/protocol.js:122:16)19at Object.closeTarget (/Users/mohammedshahid/Downloads/PlaywrightTest/node_modules/playwright/lib/server/cjs/protocol/protocol.js:1102:23)20at new Promise (<anonymous>)21at CRBrowserContext._doCloseTarget (/Users/mohammedshahid/Downloads/PlaywrightTest/node_modules/playwright/lib/server/cjs/chromium/crTarget.js:52:16)22at CRBrowserContext._doClose (/Users/mohammedshahid/Downloads/PlaywrightTest/node_modules/playwright/lib/server/cjs/chromium/crBrowser.js:70:18)23at CRBrowserContext.dispose (/Users/mohammedshahid/Downloads/PlaywrightTest/node_modules/playwright/lib/server/cjs/chromium/crBrowser.js:60:18)24at CRBrowser.dispose (/Users/mohammedshahid/Downloads/PlaywrightTest/node_modules/playwright/lib/server/cjs/chromium/crBrowser.js:115:21)

Using AI Code Generation

1(async () => {2  const browser = await chromium.launch();3  const page = await browser.newPage();4  await page.screenshot({ path: 'example.png' });5  await page.close();6  await browser.close();7})();8    at new Promise (<anonymous>)9    at CDPSession.send (/home/knoldus/Downloads/playwright/node_modules/playwright-core/lib/client/connection.js:303:12)10    at async BrowserContext.dispose (/home/knoldus/Downloads/playwright/node_modules/playwright-core/lib/client/browserContext.js:101:9)11    at async Promise.all (index 0)

Using AI Code Generation

1const {chromium} = require('playwright');2(async () => {3  const browser = await chromium.launch();4  const page = await browser.newPage();5  await browser.disposeObject(page);6  await browser.close();7})();

Using AI Code Generation

1const { disposeObject } = require('playwright/lib/client/initializer');2const { chromium } = require('playwright');3(async () => {4  const browser = await chromium.launch();5  const context = await browser.newContext();6  const page = await context.newPage();7  await page.screenshot({ path: 'example.png' });8  disposeObject(browser);9  disposeObject(context);10  disposeObject(page);11})();

Using AI Code Generation

1const {disposeObject} = require('playwright/lib/server/chromium/crBrowser');2const {chromium} = require('playwright');3(async () => {4  const browser = await chromium.launch();5  const context = await browser.newContext();6  const page = await context.newPage();7  disposeObject(page);8  disposeObject(context);9  disposeObject(browser);10})();11const {disposeObject} = require('playwright/lib/server/chromium/crBrowser');12const {chromium} = require('playwright');13(async () => {14  const browser = await chromium.launch();15  const context = await browser.newContext();16  const page = await context.newPage();17  disposeObject(page);18  disposeObject(context);19  disposeObject(browser);20})();21const {disposeObject} = require('playwright/lib/server/chromium/crBrowser');22const {chromium} = require('playwright');23(async () => {24  const browser = await chromium.launch();25  const context = await browser.newContext();26  const page = await context.newPage();27  disposeObject(page);28  disposeObject(context);

Using AI Code Generation

1const { PlaywrightInternal } = require('playwright/lib/server/playwright');2const { BrowserServer } = require('playwright/lib/server/browserServer');3const { BrowserType } = require('playwright/lib/server/browserType');4const { Browser } = require('playwright/lib/server/browser');5const { BrowserContext } = require('playwright/lib/server/browserContext');6const { Page } = require('playwright/lib/server/page');7const { Frame } = require('playwright/lib/server/frame');8const { Worker } = require('playwright/lib/server/worker');9const { ElementHandle } = require('playwright/lib/server/elementHandler');10const { JSHandle } = require('playwright/lib/server/javascript');11const { TimeoutError } = require('playwright/lib/server/errors');12const { helper } = require('playwright/lib/server/helper');13const { debugLogger } = require('playwright/lib/server/debugLogger');14const playwrightInternal = new PlaywrightInternal();15const browserType = playwrightInternal.createBrowserType('chromium');16const browserServer = await browserType.launchServer({ headless: false });17const browser = await browserType.connect({ wsEndpoint: browserServer.wsEndpoint() });18const context = await browser.newContext();19const page = await context.newPage();20const frame = page.mainFrame();21const elementHandle = await frame.$('body');22const jsHandle = await frame.evaluateHandle(() => document.body);23const worker = await page.waitForEvent('worker');24const timeoutError = new TimeoutError('Timeout');25const disposeObject = (object) => {26  if (object instanceof BrowserServer) {27    browserServer.dispose();28  } else if (object instanceof BrowserType) {29    browserType.dispose();30  } else if (object instanceof Browser) {31    browser.dispose();32  } else if (object instanceof BrowserContext) {33    context.dispose();34  } else if (object instanceof Page) {35    page.dispose();36  } else if (object instanceof Frame) {37    frame.dispose();38  } else if (object instanceof ElementHandle) {39    elementHandle.dispose();40  } else if (object instanceof JSHandle) {41    jsHandle.dispose();42  } else if (object instanceof Worker) {43    worker.dispose();44  } else if (object instanceof TimeoutError) {45    timeoutError.dispose();46  } else {47    throw new Error('Unknown object type');48  }49};50const { PlaywrightInternal }

Using AI Code Generation

1const { chromium } = require('playwright');2const { disposeObject } = require('playwright/lib/client/selectorEngine');3(async () => {4    const browser = await chromium.launch();5    const context = await browser.newContext();6    const page = await context.newPage();7    await page.screenshot({ path: 'example.png' });8    await browser.close();9})();10const { chromium } = require('playwright');11const { disposeObject } = require('playwright/lib/client/selectorEngine');12(async () => {13    const browser = await chromium.launch();14    const context = await browser.newContext();15    const page = await context.newPage();16    await page.screenshot({ path: 'example.png' });17    await browser.close();18})();19const { chromium } = require('playwright');20const { disposeObject } = require('playwright/lib/client/selectorEngine');21(async () => {22    const browser = await chromium.launch();23    const context = await browser.newContext();24    const page = await context.newPage();25    await page.screenshot({ path: 'example.png' });26    await browser.close();27})();28const { chromium } = require('playwright');29const { disposeObject } = require('playwright/lib/client/selectorEngine');30(async () => {31    const browser = await chromium.launch();32    const context = await browser.newContext();33    const page = await context.newPage();34    await page.screenshot({ path: 'example.png' });35    await browser.close();36})();37const { chromium } = require('playwright');38const { disposeObject } = require('playwright/lib/client/selectorEngine

StackOverFlow community discussions

Questions

Discussion

Jest + Playwright - Test callbacks of event-based DOM library

Running Playwright in Azure Function

How to run a list of test suites in a single file concurrently in jest?

firefox browser does not start in playwright

Is it possible to get the selector from a locator object in playwright?

firefox browser does not start in playwright

This question is quite close to a "need more focus" question. But let's try to give it some focus:

Does Playwright has access to the cPicker object on the page? Does it has access to the window object?

Yes, you can access both cPicker and the window object inside an evaluate call.

Should I trigger the events from the HTML file itself, and in the callbacks, print in the DOM the result, in some dummy-element, and then infer from that dummy element text that the callbacks fired?

Exactly, or you can assign values to a javascript variable:

const cPicker = new ColorPicker({
  onClickOutside(e){
  },
  onInput(color){
    window['color'] = color;
  },
  onChange(color){
    window['result'] = color;
  }
})

And then

it('Should call all callbacks with correct arguments', async() => {
    await page.goto(`http://localhost:5000/tests/visual/basic.html`, {waitUntil:'load'})

    // Wait until the next frame
    await page.evaluate(() => new Promise(requestAnimationFrame))

    // Act
   
    // Assert
    const result = await page.evaluate(() => window['color']);
    // Check the value
})

https://stackoverflow.com/questions/65477895/jest-playwright-test-callbacks-of-event-based-dom-library

Assuming you are not running test with the --runinband flag, the simple answer is yes but it depends ????

There is a pretty comprehensive GitHub issue jest#6957 that explains certain cases of when tests are run concurrently or in parallel. But it seems to depend on a lot of edge cases where jest tries its best to determine the fastest way to run the tests given the circumstances.

To my knowledge there is no way to force jest to run in parallel.

Aside

Have you considered using playwright instead of puppeteer with jest? Playwright has their own internally built testing library called @playwright/test that is used in place of jest with a similar API. This library allows for explicitly defining test groups in a single file to run in parallel (i.e. test.describe.parallel) or serially (i.e. test.describe.serial). Or even to run all tests in parallel via a config option.

// parallel
test.describe.parallel('group', () => {
  test('runs in parallel 1', async ({ page }) => {});
  test('runs in parallel 2', async ({ page }) => {});
});

// serial
test.describe.serial('group', () => {
  test('runs first', async ({ page }) => {});
  test('runs second', async ({ page }) => {});
});

https://stackoverflow.com/questions/73497773/how-to-run-a-list-of-test-suites-in-a-single-file-concurrently-in-jest

I found the error. It was because of some missing libraries need. I discovered this when I downgraded playwright to version 1.9 and ran the the code then this was the error msg:

(node:12876) UnhandledPromiseRejectionWarning: browserType.launch: Host system is missing dependencies!

Some of the Universal C Runtime files cannot be found on the system. You can fix
that by installing Microsoft Visual C++ Redistributable for Visual Studio from:
https://support.microsoft.com/en-us/help/2977003/the-latest-supported-visual-c-downloads

Full list of missing libraries:
    vcruntime140.dll
    msvcp140.dll
Error
    at Object.captureStackTrace (D:\Projects\snkrs-play\node_modules\playwright\lib\utils\stackTrace.js:48:19)
    at Connection.sendMessageToServer (D:\Projects\snkrs-play\node_modules\playwright\lib\client\connection.js:69:48)
    at Proxy.<anonymous> (D:\Projects\snkrs-play\node_modules\playwright\lib\client\channelOwner.js:64:61)
    at D:\Projects\snkrs-play\node_modules\playwright\lib\client\browserType.js:64:67
    at BrowserType._wrapApiCall (D:\Projects\snkrs-play\node_modules\playwright\lib\client\channelOwner.js:77:34)
    at BrowserType.launch (D:\Projects\snkrs-play\node_modules\playwright\lib\client\browserType.js:55:21)
    at D:\Projects\snkrs-play\index.js:4:35
    at Object.<anonymous> (D:\Projects\snkrs-play\index.js:7:3)
    at Module._compile (internal/modules/cjs/loader.js:1063:30)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:1092:10)
(Use `node --trace-warnings ...` to show where the warning was created)
(node:12876) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). To terminate the node process on unhandled promise rejection, use the CLI flag `--unhandled-rejections=strict` (see https://nodejs.org/api/cli.html#cli_unhandled_rejections_mode). (rejection id: 1)
(node:12876) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.

A list of missing libraries was provided. After successful installments, firefox ran fine. I upgraded again to version 1.10 and firefox still works.

https://stackoverflow.com/questions/66984974/firefox-browser-does-not-start-in-playwright

Well this is one way, but not sure if it will work for all possible locators!.

// Get a selector from a playwright locator
import { Locator } from "@playwright/test";
export function extractSelector(locator: Locator) {
    const selector = locator.toString();
    const parts = selector.split("@");
    if (parts.length !== 2) { throw Error("extractSelector: susupect that this is not a locator"); }
    if (parts[0] !== "Locator") { throw Error("extractSelector: did not find locator"); }
    return parts[1];
}

https://stackoverflow.com/questions/72044959/is-it-possible-to-get-the-selector-from-a-locator-object-in-playwright

I found the error. It was because of some missing libraries need. I discovered this when I downgraded playwright to version 1.9 and ran the the code then this was the error msg:

(node:12876) UnhandledPromiseRejectionWarning: browserType.launch: Host system is missing dependencies!

Some of the Universal C Runtime files cannot be found on the system. You can fix
that by installing Microsoft Visual C++ Redistributable for Visual Studio from:
https://support.microsoft.com/en-us/help/2977003/the-latest-supported-visual-c-downloads

Full list of missing libraries:
    vcruntime140.dll
    msvcp140.dll
Error
    at Object.captureStackTrace (D:\Projects\snkrs-play\node_modules\playwright\lib\utils\stackTrace.js:48:19)
    at Connection.sendMessageToServer (D:\Projects\snkrs-play\node_modules\playwright\lib\client\connection.js:69:48)
    at Proxy.<anonymous> (D:\Projects\snkrs-play\node_modules\playwright\lib\client\channelOwner.js:64:61)
    at D:\Projects\snkrs-play\node_modules\playwright\lib\client\browserType.js:64:67
    at BrowserType._wrapApiCall (D:\Projects\snkrs-play\node_modules\playwright\lib\client\channelOwner.js:77:34)
    at BrowserType.launch (D:\Projects\snkrs-play\node_modules\playwright\lib\client\browserType.js:55:21)
    at D:\Projects\snkrs-play\index.js:4:35
    at Object.<anonymous> (D:\Projects\snkrs-play\index.js:7:3)
    at Module._compile (internal/modules/cjs/loader.js:1063:30)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:1092:10)
(Use `node --trace-warnings ...` to show where the warning was created)
(node:12876) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). To terminate the node process on unhandled promise rejection, use the CLI flag `--unhandled-rejections=strict` (see https://nodejs.org/api/cli.html#cli_unhandled_rejections_mode). (rejection id: 1)
(node:12876) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.

A list of missing libraries was provided. After successful installments, firefox ran fine. I upgraded again to version 1.10 and firefox still works.

https://stackoverflow.com/questions/66984974/firefox-browser-does-not-start-in-playwright

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